What was found
ON APPROACH PILOT NOTICED HYD PRESS BOUNCING BETWEEN 1800 & 1000 PSI. SHORTLY THEREAFTER RT HYD PRESS ANNUNCIATOR ILLUMINATED. PILOT DECIDED TO PERFORM A MANUAL EXTENSION OF LG, PILOT RECEIVED THREE GREEN DOWN & LOCKED INDICATOR LIGHTS. LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING REVEALED A PIN HOLE IN LG SYS GEAR UP HYD LINE. R & R LINE WITH NEW FABRICATED 27-81032-081 HYD LINE & BOTH HYD PUMP DUE TO CAVITATION’S OF PUMP IAW MM 29-00-00. OPERATIONAL CHECKS PERFORMED IAW MM 29-10-20.